Mercedes-Benz W169 W245 A B 200 CDI Engine Control Unit Module ECU A6401507479

Mercedes-Benz W169 W245 A B 200 CDI Engine Control Unit Module ECU is a specialized component from the Electronic control modules and controllers group, designed for precise management of the powertrain in A-Class and B-Class models. It is responsible for controlling combustion parameters, fuel dosage, and interaction with other vehicle systems, which translates into stable, predictable operation of the 200 CDI diesel engine. Thanks to its factory design, the controller maintains full compatibility with the Mercedes electrical architecture, facilitating service and diagnostics.

Specifications and technical data

• SKU: A6401507479
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401507479
• Substitutable numbers: A6401507479, A 640 150 74 79, 0281013024, 0 281 013 024, ŁS
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The engine computer in a Mercedes A-Class and B-Class with a 200 CDI unit acts as the central processing unit responsible for controlling injection, managing auxiliary equipment, and communicating with other vehicle modules. It analyzes signals from sensors, selects appropriate operating maps, and monitors key parameters to ensure the engine runs in a consistent and predictable manner. Using a dedicated controller allows for maintaining the correct torque characteristics and refinement typical of Mercedes.

Benefits of using an original Mercedes module

Using an original control module from the Electronic control modules and controllers group ensures:

• preservation of the factory 200 CDI engine control logic,
• proper cooperation with the vehicle's electrical installation and communication network,
• consistency with diagnostic software used in service centers,
• possibility of further configuration and adaptation according to the manufacturer's procedures.

As a result, the engine computer can be integrated into the existing vehicle architecture without the need for non-factory modifications, which is particularly important for maintaining the stability of safety and comfort systems.

Product characteristics and condition

The offered controller is a used item, which in practice means it has been removed from a vehicle and was previously in operation. Such modules are frequently chosen for repairs where maintaining the original specification while optimizing costs is a priority. A used engine computer, when properly selected and installed, allows for restoring the efficiency of the control system without interfering with the engine's construction.

In the case of control electronics, it is particularly important to match the manufacturer's markings as well as the hardware and software versions. This unit belongs to the family of controllers used in Mercedes vehicles with the 200 CDI engine, which facilitates integration with the factory wiring harness and other vehicle modules.

Selection, installation, and compatibility

For the engine computer to work correctly, it must be matched to the specific vehicle configuration, taking into account the body version, model year, and equipment. In practice, this means:

• verifying compatibility by OEM number and interchangeable numbers,
• checking compatibility with the vehicle's current software,
• planning for potential adaptation or programming at a specialized service center.

Professional installation includes proper connection of connectors, inspection of the electrical installation, and performing adaptation procedures in accordance with the manufacturer's guidelines. This allows the controller to fully take over the engine management function without communication errors or unwanted messages on the dashboard.

Technical support and additional information

If you want to better understand how to safely select and install used control modules, including engine computers and sensors, it is worth consulting practical technical materials. A detailed discussion on selection by OEM number, hardware and software compatibility principles, and example installation procedures can be found in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?, prepared as a guide from a service perspective.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as controllers, ECU modules, or electronic management units, check the available parts in the Mercedes electronic control modules and controllers category.